The label on a candy bar says 400 Calories.  Assuming a typical efficiency for energy use by the body, if a 57 kg person were to use the energy in this candy bar to climb stairs, how high could she go?

Q: )How long in minutes will the energy in a 904 k) (216 kcal) cup of yogurt last in a woman doing work…

A: Given: The energy is 904 kJ.             The power is 125 W.             The efficiency is 20.0%.…

Q: A fire is lit in a hot air balloon, causing 100 J of heat to flow into the air in the balloon.…

A: The change in internal energy is given by, ∆U=Q-W

Q: A crate of fruit with a mass of 31.0 kg and a specific heat capacity of 3600j/(kgxk) slides 8.40m…

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Q: A heat engine receives 500 j of heat from its combustion process and loses 391 J through the exhaust…

A: Given data:  Heat input (Qin) = 500 J Heat loss = 391 J Required: The efficiency of heat engine

Q: A 2000kg car is advertised that it can go from rest to 30m/s, drives 100km, and 3000m in height on 1…

A: Part (a): The 1 gram of gasoline gives 5×104 J of heat energy. Hence, the total heat energy (Q)…

Q: A refrigerator does 26.0 kJ of work while moving 107 k] of thermal energy from inside the…

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Q: While riding his bicycle, Jans does 7.5 E7 J of work and gives off 4.3 E7 J of heat. What is the…

A: Given Data:Work done Heat released To Determine:The change in the internal energy of the person.

Q: A 4-ton air conditioner removes 5.06×107 J (48,000 British thermal units) from a cold environment in…

A: Given: air conditioner removes 5.06×107 J Or 48000 British thermal units Time 1 hr or 3600 sec (a)…

Q: A 70- kg man can store about 120000  kcal of energy as fat. How far could such a man run on this…

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Q: Suppose that a 59 kg boy and a 48 kg girl rode a car. They a traveled a 9 km distance. In 5.4 s,…

A: Mass of the car=3760 kg mass of the boy=59 kg mass of the girl=48 kg Total mass of the system =3867…

Q: An automobile engine operates with an overall efficiency of 12%. How much energy in gallons of…

A: The formula for the efficiency of the automobile engine is:

Q: A 60-kg hiker wishes to climb to the summit of Mt. Ogden, an ascent of 5000 vertical feet (1500 m).…

A: ⇒   Given     Mass of hiker M = 60kg.     height og mountain h = 1500 m.

Q: An electrical power station uses 1.58 x 1014 J of heat Input with an efficiency of 35.7%. (a) How…

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Q: A heat pump is a heating system that has an efficiency of about 150 %, that is, for every joule (J)…

A: Let us first look at the statement of Second Law of Thermodynamics, the Kelvin-Planck Statement:…

Q: Give an explanation of how food energy (calories) can be viewed as molecular potential energy…

A: Given: Food energy can be viewed as molecular potential energy is discussed below.

Q: According to their website, a single Wawa Italian Hoagie contains 450 food calories. Refer to…

A: It is given that,

Q: A weightlifter curls a 28 kg bar, raising it each time a distance of 0.55 m.  How many times must…

A:

Q: A heat engine exhausts 3 200 J of waste heat while performing 1 500 J of useful net work. What is…

A: Given data: Work done W=1500J Heat exhausted QC=3200J

Q: If the calories needed to ascend a 7-storey building are 60 Kcal, and your body efficiency is 17%,…

A: Write the given values with the suitable variables. Q=60 kcalη=17%=0.17 Here, Q is the food energy…

Q: Alice, whose mass is 55 kg, eats a jelly doughnut for breakfast. According to the nutrition label,…

A: The energy possessed by an object when it is raised to an height h above the ground is known as the…

Q: In an average human, basic life processes require energy to be supplied at a steady rate of 100 W.…

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Q: work done on the copper bar

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Q: As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential…

A: Given Data: The input energy is: Qi=11100 J The output energy is: Qo=3700 J

Q: During running, you lost 4.0×104 J of heat, and your internal energy also decreased by 1.6×105 J.…

A: Change in Internal energy, ∆U=-1.6×105J Heat lost, Q=-4.0×104J

Q: As a gasoline engine is running, an amount of gasoline containing 15,200 J of chemical potential…

A:

Q: What kind of stored energy enables a stretched bow to shoot an arrow? gravitational potential energy…

A: Given data:  An arrow shoot from a stretched bow Required: The kind of energy stored in the…

Q: The nutritional calorie (Calorie) is equivalent to 1 kcal. Onepound of body fat is equivalent to…

A: Given: 1 nutritional calorie = 1kcal 1 pound of fat = 4.1x103 nutritional calories amount of…

Q: If you drop a piece of ice on a hard surface, the energy of impact will melt some of the ice. The…

A: (a)The heat energy required to melt the given mass of ice is given by the product of its mass and…

Q: A weightlifter curls a 35 kg bar, raising it each time a distance of 0.60 m. How many times must he…

A: A slice of pizza contains 1260 J. A fraction of this energy can be used as work and the remaining is…

Q: In the past decades, coal was used to heat the engine of a steam locomotive. With the engine, a…

A: Given that:

Q: A worker drives a 0.500 kg spike into a rail tie with a 2.50 kg sledgehammer. The hammer hits the…

A: The concepts used to solve this problem are kinetic energy and internal energy. Initially, use the…

Q: When you put on the brakes on your bicycle, friction heats the steel rims of your wheels. Could this…

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Q: A weightlifter curls a 26 kg bar, raising it each time a distance of 0.65 m . How many times must he…

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Q: A 46-kg woman eats a 522 Calorie (522 kcal) jelly doughnut for breakfast. (a) How many joules of…

A: Given: mass of woman, m = 46 kg doughnut jelly energy, E= 522 calorie To Find: (a) Joule of energy…

Q: An ideal heat engine operates between 177 degree C and 27 degree C. If the engine takes 5*1000000 J…

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Q: When you skid to a stop on your bike, you can significantly heat the small patch of tire that rubs…

A: As mentioned in the question statement, the expression for the normal reaction and bike and rider…

Q: A hot plate is used to transfer 400 cal of heat to a beaker containing ice and water. 500 J of work…

A:

Q: The engine of a large ship does 1.97  1010 J of work with an efficiency of 8.60%. (a) How much…

A: Given : W = 1.97 x 1010 J e = 8.60% = 0.086

Q: A 32% efficient electric power plant produces 900 MJ of electric energy per second and discharges…

A:

Q: A spring has a natural length of 40 cm. A force of 60N is required to keep the spring compressed 10…

A: Given data:  Natural length (L0) = 40 cm Focal (F) = 60 N Comparison (x) = 10 cm = 0.10 m Required:…

Q: A typical coal-fired power plant burns 340 metric tons of coal every hour to generate 2.5 × 106 MJ…

A: The efficiency of the power plant can be given by e=WoutQh×100%

Q: An exercise machine indicates that you have worked off 2.1 Calories in a minute-and-a-half of…

A: We must calculate the power output in watts and horsepower during the workout period. We are aware…

Q: The driver of a car that has a mass of 1400 kg is coasting down a hill. He sees a stop sign at the…

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Q: A heat pump is used to maintain a house at 25°C by extracting heat from the outside air on a day…

A: